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(No Model.)

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No. 580,088. Patented Apr. 6, 1897.

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UNITED STATES 'PATENT OFFICE.

EDVARD G. HOIVER AND OLIVER E. AULTMAN, OF TRINIDAD, COLORADO.

ENVELOP.

SPECIFICATION forming part of Letters Patent No. 580,088, dated April 6, 1897.

Application led July 2'7, 1896. Serial No. 600,656. (No model.)

To all whom it may concern:

Be it known that we, EDWARD G. HoWER. and OLIVER E. AULTMAN, citizens of the United States, residing at Trinidad, in the county of Las Animas and State of Colorado, have invented certain new and useful Improvements in Envelops; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

Our invention relates to improvements in envelops; and it has for its general object to provide a cheap, simple, and strong envelop which when closed is not liable to casually open and lose its contents and one which it is exceedingly difficult to open without damaging it so that it can notbe closed or used again.

Other objects and advantages of the invention will be fully understood from the following description and claims when taken in connection with the annexed drawings, in which- Figure l is a plan view of the blank from which our improved envelop is formed. Fig. 2 is a transverse section of the envelop on an enlarged scale. Fig. 3 is a top plan view of the envelop with the inner closing-flap partly broken away and the flaps spread open. Figs. l and 5 are enlarged detail views illustrating the manner in which the end flaps are connected.

Referring by letter to said drawings, A indicates the blank from which our improved envelop is formed. This blank A, which is of the form shown, is folded longitudinally at a to form the front and back portions B C of the envelopbody, at b to form the outer closing-flap D, and at o to form the inner closing-flap E, and said blank A is also folded transversely at d and e, which folds, in conjunction with the fold a, form the flaps F G at opposite ends of the front portion B of the envelop-body and the flaps H and I of the back portion C of the envelop-body, the said flaps H and I being arranged adjacent to the flaps G F, respectively, as shown. The flaps G I, at opposite ends of the envelop, are of a greater width than the flaps H F, as shown, and they are folded on the lines f g to form the supplemental flaps J K, which are (lesigned for a purpose presently to be described.

In forming our improved envelop from the blank A just described the end iiaps G H and F I are foldedinwardly upon the body portion of the lines d and e, and the blank is then folded upon itself on the line CL, so as to form the body portion of the envelop. This being done, the supplemental iiaps J K of the end flaps G I are folded against the inner sides of the end iiaps H F, as better shown in Figs. 3, 4, and 5 of the drawings. The end flaps J G H and the end flaps F,I, and K may be fastened together in any suitable manner, so as to securely close the ends of the envelop. IVe prefer, however, to conneet the contiguous sides of the flaps F and I and the flaps G and H together by a suitv able adhesive and to connect the flaps J and H and the iiaps K and F by a suitable adhesive and also by 'paper-fasten ers, which take through the flaps K F I and the flaps J, H, and G, as better shown in Figs. et and 5. In virtue of the flaps G and I being arranged against the flaps H and F and provided with the supplemental iiaps J K, which lap the flaps H and F and are connected thereto by fasteners L, it will be seen that the ends of the envelop-body are securely closed and that if the portions of the said flaps which are connected by adhesive substance become disconnected there is no danger of the ends opening, as the fasteners will securely hold the end iiaps together and prevent loss of the contents of the envelop. For this reason the end flaps may be connected by fasteners alone when desired. Said iiaps may also be connected by adhesive alone, as the arrangement thereof reduces the liability of casual disconnection to a minimum.

The inner closing-Hap E of the envelop is almost as wide as the body formed by the portions B and C, and itis provided upon its outer side adjacent to its free edge with dry adhesive, (indicated by h,) which when moistened and when the flap is folded into the envelop-body, as shown in Fig. 2, is designed to connect said flap E with the inner side of the back portion C of the envelop-body. Then thus arranged and connected to the back body portion C, said flap E forms one closure of the envelop. The other closure is formed by the lap D, which is designed to be folded down against the outside of the front body portion B and be connected thereto by adhesive 1l or any other suitable means.

As will be readily appreciated, the inner closing-Hap F. reinforces the outer closing-flap D, and the two together form a strong and secure closure. The inner flap E is entirely covered, as will be observed by reference to Fig. 2, and is therefore not likely to be disconnected from the body portion C by friction or by being caught into any object during the handling or transportation of mail, and therefore casual opening of the envelop is reduced to a minimum. It will also be observed that the said iiap E isconnected to the body portion O of the envelop within the envelop, and therefore cannot be disconnected therefrom without first opening the flap E and materially damaging the envelop. This, as will be readily appreciated, peculiarly fits the envelop for confidential service and also for carrying money,as when the envelop is opened and again closed by an unauthorized person such opening may be readily detected.

It will be seen that While cheap and easily made our improved envelop is very strong and durable, and for the reasons above mentioned is peculiarly litted for important service, such as carrying important papers and money.

We have specilically described the construction and relative arrangement of the parts of the envelop in order to impart a clear and exact understanding of the same. We

do not, however, desire 'to be understood as confining ourselves to such exact construction and arrangement, as such changes or modifications may be made in practice as fairly fall within the scope of the claims.

Having described our invention, what we claim isl. The envelop described comprising the body portion B, having the inwardly-folded end flap F, at one end and the inwardlyfolded flap G, at its opposite end provided with a supplemental flap J, the body portion C, having the inwardly-folded flap H, at one end and the inwardly-folded flap l, at its opposite end provided with a supplemental ilap K, means for connecting the flaps H, G, J, at one end of the envelop, and the flaps F, I, K, at the opposite end thereof, the inner closingiiap connected to the edge of the body portionA B, and having an adhesive substance on its outer side and the outer closing-flap connected to the edge of the body portion C, substantially as specified.

2. The herein-described blank for forming an envelop, the saine consisting of the foldable rectangular section B, C, having at one end the foldable section E, and at its opposite end the foldable section D, and also having the foldable section F, and the foldable section I, K, of greater width than the section F, at one side and the foldable section H, and the foldable section G, J, of greater width than the section H, at its opposite side, substantially as specified.

In testimony whereof we affix our signatures in presence of two witnesses.

EDWARD G. HOVER. OLIVER E. AULTMAN.

YVitnesses:

GEO. S. GREENFIELD, G. XV. BENEDICT. 

